O'Fallon, Illinois Weather
O'Fallon, Illinois — live current conditions, hourly and 7-day forecasts, NWS alerts, aviation weather, radar and satellite imagery for O'Fallon, St. Clair County.
Flight conditions near O'Fallon. Data source: locating…
About O'Fallon, Illinois
O'Fallon unfolds across a landscape of gentle, fertile plains, where the horizon stretches wide under a sky that often seems to hold its breath before a storm. The land here, a rich, dark loam, whispers of the agricultural bounty it has sustained for generations, its contours softened by rolling fields and the occasional stand of mature oak and maple trees. As the sun dips, it casts a warm, amber glow across the western edges of O'Fallon, painting the scattered farmsteads and the newer residential developments in a quiet, enduring light. The air, especially in the late afternoon, carries a faint, earthy scent, a mingling of freshly turned soil and the distant hum of life. The roots of O'Fallon run deep, tracing back to the pioneering spirit that first settled these Illinois prairies, drawn by the promise of fertile land and westward expansion. While its origins are agricultural, O'Fallon has steadily grown, its economy now a blend of commerce, industry, and the continuing legacy of farming that shapes the surrounding countryside. The town serves as a vital hub for the region, its streets alive with the daily commerce of families and businesses, a steady pulse that belies its tranquil appearance. Distinctive among its neighbors, O'Fallon has cultivated a character of pragmatic optimism, a place where the past is honored but the future is actively built, a characteristic reflected in its well-maintained parks and the vibrant community events that punctuate the year.
Live animated radar for O'Fallon and surroundings — RainViewer.
NOAA GOES-16 GEOCOLOR — live animated loop updated every 10 minutes. Shows cloud cover, storm systems and weather patterns across the continental US.
Source: NOAA/NESDIS GOES-East · Public domain · Auto-updates on page reload
| Location | O'Fallon, St. Clair County, Illinois |
| Coordinates | 38.592272°N, 89.911212°W |
| Timezone | Central Time (America/Chicago) |
| ZIP Code(s) | 62269 |
| Area Code | 217 |
| Page generated | July 2026 |
| Weather data | Open-Meteo (open-source), NOAA National Weather Service |
About This O'Fallon, Illinois Weather Page
This page provides live weather conditions and forecasts for O'Fallon, Illinois, including current conditions, a 24-hour hourly forecast, 7-day outlook, NWS extended text forecast, real-time aviation weather (live METAR and TAF reports from the nearest reporting airport, with a modeled estimate shown when no station is in range), precipitation radar and NOAA GOES-16 satellite imagery. Additional sections may include tide predictions, wave height, wave direction and sea-surface temperature, a barometric pressure trend, and a solunar-based fishing forecast with a fishing-conditions rating for coastal localities, and soil temperature, crop weather and live USGS river gauge data for agricultural areas near a monitored waterway. All data updates automatically on every page visit.
Location data for O'Fallon includes coordinates 38.592272°N, 89.911212°W, situated in St. Clair County. ZIP code 62269. Telephone area code: 217. Timezone: Central Time (America/Chicago).
Weather data is sourced from the NOAA National Weather Service (NWS) and the open-source Open-Meteo API. Aviation data is sourced from aviationweather.gov (NOAA), with a modeled estimate used where no nearby reporting station is available. River and stream data is sourced from the USGS National Water Information System. Tide predictions are sourced from NOAA CO-OPS; marine and solunar data are modeled from Open-Meteo and public sunrise/moon calculations and should be treated as a general guide alongside on-the-water conditions. Radar is provided by RainViewer. Satellite imagery is sourced from NOAA/NESDIS GOES-East and is public domain.
